Michelin tire question
01-13-18, 07:00 PM
#31
Road and Track magazine:
Plenty of modern cars have electronic enhancements that are keyed to wheel rotation, things like stability and yaw management, traction control and, of course, ABS. Any marked change in a tire's overall diameter, and hence in its rolling circumference, is bound to affect these calibrations — perhaps in a detrimental way.
Tire Rack answers to people with similar questions:
The overall diameter of your 185/55R16 tires is 24", and the 205/65R16 is a much taller 26.5". I have two concerns with the taller tire; I would expect a little rubbing if the spring were fully compressed (or bottomed out), and that your ABS or any traction control systems would not function properly when needed.
The 215/70R16 is a little too small in diameter (27.8" overall) compared to the OE tire (29" tall) to be used safely as it may cause issues with your ABS and / or traction control systems. The narrowest tire we can guarantee to work is 225/65R17 for reference.
Our records indicate the original Kia wheels are 16x6.5, so the 235/70R16 would fit the wheel. Our concern is that the 235/70R16 is 2" taller in overall diameter so there may be rubbing or issues with your ABS not working as intended. We could not recommend the use of that taller tire.
The 275/65R18 would be approximately 1.5" wider and 2.3" taller (overall) than your current tire size. The change in diameter would be the concern as it is 7.7% taller and would cause problems with your ABS system (along with your speedometer). In addition, the wider tire requires at least an 7.5" wide wheel, so your existing wheels may not work.
The 195/65R15 size would cause the speedometer to indicate a speed that was 3.3% slower than your actual speed. We would also expect some issues with the performance / accuracy of your ABS system as well, so we would not recommend the use of this taller size. If you like the Pure Contact, consider the Bridgestone Turanza Serenity Plus in your 195/60R15 size as a viable option.
Is this enough or should I keep going? Unless you can tell me what you know that the rest of these good folks don't?
Plenty of modern cars have electronic enhancements that are keyed to wheel rotation, things like stability and yaw management, traction control and, of course, ABS. Any marked change in a tire's overall diameter, and hence in its rolling circumference, is bound to affect these calibrations — perhaps in a detrimental way.
Tire Rack answers to people with similar questions:
The overall diameter of your 185/55R16 tires is 24", and the 205/65R16 is a much taller 26.5". I have two concerns with the taller tire; I would expect a little rubbing if the spring were fully compressed (or bottomed out), and that your ABS or any traction control systems would not function properly when needed.
The 215/70R16 is a little too small in diameter (27.8" overall) compared to the OE tire (29" tall) to be used safely as it may cause issues with your ABS and / or traction control systems. The narrowest tire we can guarantee to work is 225/65R17 for reference.
Our records indicate the original Kia wheels are 16x6.5, so the 235/70R16 would fit the wheel. Our concern is that the 235/70R16 is 2" taller in overall diameter so there may be rubbing or issues with your ABS not working as intended. We could not recommend the use of that taller tire.
The 275/65R18 would be approximately 1.5" wider and 2.3" taller (overall) than your current tire size. The change in diameter would be the concern as it is 7.7% taller and would cause problems with your ABS system (along with your speedometer). In addition, the wider tire requires at least an 7.5" wide wheel, so your existing wheels may not work.
The 195/65R15 size would cause the speedometer to indicate a speed that was 3.3% slower than your actual speed. We would also expect some issues with the performance / accuracy of your ABS system as well, so we would not recommend the use of this taller size. If you like the Pure Contact, consider the Bridgestone Turanza Serenity Plus in your 195/60R15 size as a viable option.
Is this enough or should I keep going? Unless you can tell me what you know that the rest of these good folks don't?
Last edited by pizdets17; 01-13-18 at 07:15 PM.
01-13-18, 08:28 PM
#32
Pole Position
Is this enough or should I keep going? Unless you can tell me what you know that the rest of these good folks don't?
That said, again, with the number of cars and trucks using different than oem size rubber, why aren't we seeing what your quotes indicated would happen?
01-13-18, 10:50 PM
#33
well probably because when vehicles smash into a wall, the last thing they look at is if the tire was 6% bigger or smaller. I guess I just want to air on the side of caution with my wife and kids. I put 30,000 miles a year on my vehicle and live in a place where it was -43 Celsius two days ago and you can have snow 8 months of the year. Every bit helps for safety on the road imo. I doubt that literally every single place that has anything to do with tires and wheels Including the performance shop I deal with that builds 1000+ RWHP Supras and 911's are wrong. But if they are, all I am missing out on is 1" of rubber.
01-14-18, 07:47 AM
#34
ABS is calculated by the wheel speed sensors in your hubs. It activates when one or more wheels begins to lock up. ABS will be impacted if you use different size tires front and rear as the wheels will be rotating at different speeds. I’ve tested mine with 33” tires and it works fine. Also the Toyota recommended tire size for an LC200 with TRD 17” wheels is the same diameter as my 275/60R20 with the same ABS system.
Larger diameter tires will change the gearing on the car. I notice that my car will more readily drop a gear on a slight incline but mine is an 8-speed where it seems to operate at a very low RPM on the highway anyway. Larger diameter tires will likely be heavier and result in more unsprung weight causing a reduction in acceleration, MPG and ability to change direction. I have noticed about a 1 MPG reduction but no other negatives as it’s a truck and doesn’t handle that well in the first place.
I’d also note that there can be a variance in width and height of tires of the same size but different models or manufacturers, so if the ABS concern was that acute there would be legislation demanding tight manufacturing tolerances between manufacturers.
Larger diameter tires will change the gearing on the car. I notice that my car will more readily drop a gear on a slight incline but mine is an 8-speed where it seems to operate at a very low RPM on the highway anyway. Larger diameter tires will likely be heavier and result in more unsprung weight causing a reduction in acceleration, MPG and ability to change direction. I have noticed about a 1 MPG reduction but no other negatives as it’s a truck and doesn’t handle that well in the first place.
I’d also note that there can be a variance in width and height of tires of the same size but different models or manufacturers, so if the ABS concern was that acute there would be legislation demanding tight manufacturing tolerances between manufacturers.
01-14-18, 09:39 AM
#36
Thanks for the feedback guys, but as I said there is just too many out there saying the opposite from car manufacturer to tire manufacturer to retailers for me to ignore it. Either way tires are already bought and I am happy with the 275 55 20 choice. Thanks for everyone's input
01-14-18, 12:54 PM
#37
In most European countries you can use only tire sizes approved by the car manufacturer. That's really stupid. I am happy that here in the USA you can use almost whatever you want (most states). Especially important if you drive off-road.
01-14-18, 04:48 PM
#39
Pole Position
ABS is calculated by the wheel speed sensors in your hubs. It activates when one or more wheels begins to lock up. ABS will be impacted if you use different size tires front and rear as the wheels will be rotating at different speeds. I’ve tested mine with 33” tires and it works fine. Also the Toyota recommended tire size for an LC200 with TRD 17” wheels is the same diameter as my 275/60R20 with the same ABS system.
Larger diameter tires will change the gearing on the car. I notice that my car will more readily drop a gear on a slight incline but mine is an 8-speed where it seems to operate at a very low RPM on the highway anyway. Larger diameter tires will likely be heavier and result in more unsprung weight causing a reduction in acceleration, MPG and ability to change direction. I have noticed about a 1 MPG reduction but no other negatives as it’s a truck and doesn’t handle that well in the first place.
I’d also note that there can be a variance in width and height of tires of the same size but different models or manufacturers, so if the ABS concern was that acute there would be legislation demanding tight manufacturing tolerances between manufacturers.
Larger diameter tires will change the gearing on the car. I notice that my car will more readily drop a gear on a slight incline but mine is an 8-speed where it seems to operate at a very low RPM on the highway anyway. Larger diameter tires will likely be heavier and result in more unsprung weight causing a reduction in acceleration, MPG and ability to change direction. I have noticed about a 1 MPG reduction but no other negatives as it’s a truck and doesn’t handle that well in the first place.
I’d also note that there can be a variance in width and height of tires of the same size but different models or manufacturers, so if the ABS concern was that acute there would be legislation demanding tight manufacturing tolerances between manufacturers.
Correct-a-mundo. Using larger tires on a 200 series truck happens all the time.
I6turblo, thank you and sink for bringing reality back to the discussion. Enough paranoia here to choke a horse or 2.
01-14-18, 06:30 PM
#41
Lexus Champion
01-14-18, 07:48 PM
#45
Lexus Champion
Look it up on tire rack your thread is 8.9" on your 275/55/20 Defender. My 285/55/20 BFG AT/KO'2 is 10.1" tread width. Most members on IH8MUD run larger then stock tire's like 33" or more.